Sandy Dahl, who became one of the tragic faces of 9/11 after her husband was killed while piloting United Flight 93, died Friday, a family friend said.

Sandy Dahl in 2006 looks at a memorial that includes a likeness of her husband Jason Dahl at the Shanksville Chapel for Flight 93 in Shanksville, Pennsylvania.

 

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Dahl, 52, was found dead in her home in Colorado. Jefferson County Deputy Coroner Carl Blesch said the death was under investigation but there was no indication of foul play.

Dahl worked tirelessly running the Captain Jason Dahl Scholarship Fund and her death was a surprise, said David Dosch, the family friend.

The scholarship fund gives money to aspiring pilots to help attend commercial flight training schools.

"Sandy and Jason Dahl were my best friends," said Dosch, who also works at the scholarship fund.

Jason Dahl was piloting United Flight 93 on September 11, 2001 that crashed in a field in Shanksville, Pennsylvania. It is believed that passengers aboard United Flight 93 thwarted a plot to drive the plane through the U.S. Capitol dome and eventually caused the plane to crash in a field.

In an interview last year on the anniversary of 9/11, Stacy Dahl wore their wedding ring.

"I do think about him every day," she told CNN affiliate KMGH. "The reason I am doing this (interview) today and the reason that I do this at all is to make sure he is never forgotten."

Source: CNN Wire